No. The Chiappa Rhino has a false hammer. It acts as a manual cocker, not in the same sense as a traditional hammer. Which given the animations in Destiny, does not appear to be the way the hand cannons work. Especially when looking at something like The Last Word, which given its unique animations, appears to function much the same as a standard single-action revolver. As for ammo being digitized... it doesn't matter. The weapons are obviously based on modern firearms. As such, I expect the same thought to go into their design as you would a modern firearm... or at least make them different for a reason, as seen with the Stranger's Rifle.